Pressure-indicator.



F. E. DURHAM.

PRESSURE INDSCATC'R.

APPLiCATiON FILED FEB. 2. 19M.

Patsnted Mar. 21, 1916.

UNITED PAUL E. DURHAIfi,

'Y'u all NF/0111 it may w/mcm Be it known that I. PAUL E. DCI-H" citizen of the United States. residing Angeles. in the county 01" L05 Angeh (if California. have invnied inl iliiiJlUYHlliIitS in (if whirl, thfi fnliowing a s1 Thin inruntinn iwiaiQ-Q to a pr arm. and partirnhiriy pertains vacnr ihwi-se for attaclnmm'; to shun (if a IHiEliil'liltiK' fire or A aiicati extent of air Pl'kfihlil't delixercd t i IL is the ohject. of this inve tion \idv an indicator of the ahm d which will enable a person to in inatii tire to a detcriniiwd pr indivatoi' will :uitmnaticaiiy indicaic. u} andihie signal when the 1iz aienrrininvd amount of pressure is readied.

,inothvr object is; to provide niezzar adjusting the indivator Si) that His wiil he sounded according [0 tin: pwsssnrii. rwniirvd.

Th. inrcntioii pi ai'iiy ins whim-ii cyiira hicai raising: having an tum! partition adjn rent me em form an air ci'iainher. means for connrding said chamber with the vain: sham of a in: and in a source of air supply, a piston in said waxing. adjnstahiv spring means for nur inally maintaining said piston in an adrarwvd position to (-hiso the apnri'n in the partition. and naam "w'hvrahy tl'li. I'P-iiilfifiifii. (if said piston by air pro -12 nirriheif wiil cause Hie acnndn ndibiq. signal.

The inwntinn is iiinstratod in the accoinpanydn drawings. in whirni Figaro i. is a Hid..- \'i w of Liz dvrire: showing it appiimi. Fi' huli'nal SHliOYl of the device n tion. Fhowing it dixposod he positi n shown in Fig. in; it with iia parts in their 1'\ Limb. m the derive. vol-responding to Fig. .hm'a in; the pismn-in a rvtracted posit inn to open mmmimicatnni between the air chainher and, a whistle. Fig. 4 is a detail sbctian on the line. LA of Fig. 2. 5 is a. (ivinii and view of the device an) a radii-(red sraie as seen in the directicin (if the arro\\"--ain Fig. .2 showing ihe giadnaiions thQreon. More specifically in the drawin sates a cylindrical casing which externally at both ends to receiw e '1 0 eceivemeans 2- 1e 17 is farmed 'wiih 'wrniaiiy closed recipmva 1y he mire Z0 in Ural-inns fin or seat r finding he spring 23 face (if the line. hearing div casing 6. Qt animation in the Pctions 25 on its O-(WQS 26 provided u nion 30 i0 (.001

d to advance 2.4, by which Envision of the at the from by means 0f iivera' chambe the valve 1 air air press against t] l through Hm 'ce H26 p1 In valve )1 iv ring 23, A'hiflfh has prcvmusly been 11v 2 ing; the stem 2? to (gummy. a llifzd: vz'minuzl pressmw; c011 {he pmhsure desirm m instance, assum- 7 ing thin infmte the Mm '15 in opened t\ and the.

1. of air amount um the foregoing it wil hum provided a device wmc in construct-i051 and eificient npez'atiun and 1 .011 can, be re:

What I claim is:

in'a pressme indicubtn', the conflfimztimz of r. (2) index having Bougitudinnl slnira psn'titinn Wall @d from one end tiwrw to form a pressure: and having w; opvning Uwrvin, n plan-flit of studs cal-Fm bx :1! partition. 11 mu; fliduldy mmmhwl 11 mid siuChi, :1 haari Main slidabljy mum d in Hm (i-yindm- (m i diam i'iczzlly own-site sfvx jnngitmlinn? him. said Mute iun'inz Linn; a: time k h. 1m rmimivu 2-1 7 hearing: plate, :1 puintufor imlkmting 1m inter jmsvii 'nutxw 1'; mid bearing who to r'utnin m jfi'lii in its; seated 51 tion to nm-mufly close; pm't in the (:yiim vans.

PAUL E. DURHAM.

secured to said sta wqma, and :1, 15m! Sl'H'U-f W itnease" A! Merlin:

MAR 1F; 

